"God f--king dammit. You were such an incredible person," he wrote on Twitter after hearing the news. "You changed so many lives. Had so much love in your heart. You inspired me throughout highschool, and I wouldn't be where I was today without you. Never a more kind and sincere and beautiful person. I f--king love you mac."
"We'll make that album one day bubba," he added in a separate tweet. "Miss you so much."
Miller told Rolling Stone last month that he and Malone had been "talking about doing an album" and the two had a jam session together, along with Frank Dukes and Thundercat. "It was beautiful," Miller said, "We were just having a great time."
The two had previously collaborated on DJ Drama's "Camera" in 2016, along with Lil Uzi Vert and FKi 1st.
Malone was hardly the only rapper who paid tribute to Miller on Friday. See more tweets below from fellow musicians and celebrity fans.
So sad u gone home young Mac I had to post this to smile and think about the good Time we had on the set of this movie man god bless ya family. Pittsburg we lost a real one today 🌟 @macmiller 🙏🏾 pic.twitter.com/AZkqUlhm1V
I dont know what to say Mac Miller took me on my second tour ever. But beyond helping me launch my career he was one of the sweetest guys I ever knew. Great man. I loved him for real. Im completely broken. God bless him.
Mac I Love You! You were a huge inspiration on my come up. Thank you for the countless hours of fun listening to your music with my homies! This has me so fucked up! You will be missed and always remembered #KIDS
This is a message for anybody in this game that's going through something. If you don't feel right, if you feel you have a substance problem, if you need a ear to vent to. If you uncomfortable talking to people around you. Please reach out to me.
Never had the chance to meet Mac Miller but was a huge fan of his music. Our prayers go out to his family and friends. And for those struggling with addiction or know someone who is, please seek help you are not alone these things don't just get better
NOOO! I do not wanna believe my brother is dead! I cannot take this anymore, life is too short...I just know you're now in a better place now than this place we call Earth @MacMiller ...I love you bro, and will miss youu 😭
I can't keep losing friends like this...I wish I spent more time with you these past weeks...I'm so sorry... rip MAC...you wrote the soundtrack to my college years and I'm so happy I got to know you...this sucks this really really sucks.